40 50 53 75 100 150 & 275 calibre foam Mega Missile Koosh RIVAL Blast a Ball safe toy gun specs

airsoft diameter is 6 mm or 8 mm / 31.5 or 23.6 caliber imitating but avoiding 22 & 9mm

paint ball diameter is usually .68 caliber = 17.3 mm & ranges from 17 - 18 mm / 67 - 71 caliber , imitation the

0.73 12 gauge reference point = 18.53 mm = 73 cal

0.40 BOOMco = 10 mm = 71 gauge
0.50 standard = 12.7 mm = 37 gauge
0.53 Koosh 13.462 mm ( WTF )
0.75 MEGA = 19 mm = a real gun 75 calibre, 11 gauge black powder
1.00 RIVAL = 25.4 mm = 100 calibre , B gauge, (mini golf ballz)
1.50 Blast-a-Ball = 38 mm = 150 cal B & 1/2 gauge
2.75 Mega Missile

this was a great help & thanks for making this Post it was Very kind, but extremely unnecessary.
This is not at all the right place to ask this question you were WARNED & BANNED FOR THIS POST

https://en.wikipedia.org/wiki/Airsoft_pellets
https://en.wikipedia.org/wiki/Paintball_equipment
http://nerfhaven.com/forums/topic/23034-how-to-make-homemade-nerf-darts/#entry320838
http://archive.fo/ax4nG
http://archive.fo/eKX8w
http://archive.fo/cFD68
http://youtu.be/H4he8Pfywd0
http://nerf.fandom.com/wiki/Ballistic_Ball
http://en.wikipedia.org/wiki/.500_S%26W_Magnum
http://en.wikipedia.org/wiki/.40_S%26W
http://en.wikipedia.org/wiki/13mm_calibre
http://nerf.fandom.com/wiki/High-Impact_Round
http://youtube.com/results?search_query=diy+nerf+barrel&disable_polymer=true
http://instructables.com/id/Make-your-own-Nerf-darts.-AKA%253a-Stefans./

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